Home / 218,960.10-328,526.55-85,817.70

Finding the Fourth Proportional to 218,960.10, 328,526.55 and 85,817.70

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Solution

The fourth proportional to 218,960.10, 328,526.55 and 85,817.70 is: 128,760.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,960.10 : 328,526.55 = 85,817.70 : x
  2. Step 2: Convert to fraction form
    218,960.10/328,526.55 = 85,817.70/x
  3. Step 3: Cross multiply
    218,960.10x = 328,526.55 × 85,817.70
  4. Step 4: Simplify right side
    218,960.10x = 28,193,392,909.94
  5. Step 5: Solve for x
    x = 28,193,392,909.94/218,960.10
  6. Step 6: Final answer
    x = 128,760.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.